import {
    fromJS
} from 'immutable';
import * as actionTypes from './constants';

const defaultState = fromJS({
    singerList: [],
    enterLoading: true, //控制进场Loading
    pullUpLoading: false, //控制上拉加载动画
    pullDownLoading: false, //控制下拉加载动画
    pageCount: 0, //这里是当前页数，我们即将实现分页功能
    category: '', // 记录选择的分类
    alpha: '', // 记录选择的首字母
})

const reducer = (state = defaultState, action) => {
    switch (action.type) {
        case actionTypes.CHANGE_SINGER_LIST:
            return state.set('singerList', action.data)
        case actionTypes.CHANGE_ENTER_LOADING:
            return state.set('enterLoading', action.data)
        case actionTypes.CHANGE_PULLUP_LOADING:
            return state.set('pullUpLoading', action.data)
        case actionTypes.CHANGE_PULLDOWN_LOADING:
            return state.set('pullDownLoading', action.data)
        case actionTypes.CHANGE_PAGE_COUNT:
            return state.set('pageCount', action.data)
        case actionTypes.CHANGE_CATOGORY:
            return state.set('category', action.data)
        case actionTypes.CHANGE_ALPHA:
            return state.set('alpha', action.data)
        default:
            return state
    }
}

export default reducer